- Patent Title: Controlled spark ignited flame kernel flow in fuel-fed prechambers
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Application No.: US15332718Application Date: 2016-10-24
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Publication No.: US10907532B2Publication Date: 2021-02-02
- Inventor: Domenico Chiera , David C. Petruska , Gregory James Hampson
- Applicant: Woodward, Inc.
- Applicant Address: US CO Fort Collins
- Assignee: Woodward, Inc.
- Current Assignee: Woodward, Inc.
- Current Assignee Address: US CO Fort Collins
- Agency: Fish & Richardson P.C.
- Main IPC: F02B19/12
- IPC: F02B19/12 ; F02P13/00 ; F02P15/00 ; F02P21/02 ; F02P23/04 ; F02B19/16 ; H01T13/32 ; H01T13/54 ; F02P9/00

Abstract:
A pre-chamber spark plug that includes a shell. Additionally, the pre-chamber spark plug includes an insulator disposed within the shell. In a particular embodiment, a center electrode has a first portion surrounded by the insulator, and a second portion that extends from the insulator into a pre-chamber. The pre-chamber defined by the shell. In a further embodiment, a ground electrode is attached to the insulator. In particular embodiments, the ground electrode is tubular in shape and includes an inner spark surface ring spaced in surrounding relation to the center electrode to create a spark gap, an outer ring attached to the shell, and a plurality of rounded spokes connecting the inner and outer rings. In a particular embodiment, the ground and center electrodes accommodate attachment of precious metal alloys to increase electrode surface life. In another embodiment the ground electrode and insulator is coaxial to the center electrode.
Public/Granted literature
- US20170044970A1 CONTROLLED SPARK IGNITED FLAME KERNEL FLOW IN FUEL-FED PRECHAMBERS Public/Granted day:2017-02-16
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